2026-27 Assessment Roll

On June 30, 2026, the Assessor announced the 2026-2027 $76.38 Billion annual Property Assessment Roll which is a 4.88% increase in value compared to the prior roll. The increase is the result of reassessments for new construction, changes in ownership, annual review of decline in value properties and mandated CPI increases on Proposition 13 base values.The 2026-27 roll valuations reflect 2025 calendar-year events and market conditions as of the January 1, 2026, lien date. Please see the "2026/2027 Assessment Roll Announced" press release for detailed information.

Property owners may review their specific 2026-27 assessed value information by clicking this link, or from this webpage by using the "Services" drop down menu and clicking "Assessor Value Notice Inquiry"

If you have questions regarding your assessed value(s) you are encouraged to contact the Assessor’s office for an explanation or to request an informal review. If you are unable to resolve your concerns through discussions with the Assessor’s office, you may file a formal Assessment Appeal application. 2026-27 Assessment Appeal applications may be filed starting Thursday July 2nd, and must be filed no later than Tuesday December 1, 2026. To file an application, please contact the Clerk of the Board of Supervisors.

2026-27 roll values are delivered to the Auditor-Controller's office where tax rates are applied to the assessed roll values to calculate actual tax amounts due. The Treasurer-Tax Collector will send out unsecured tax bills starting during July 2026 which will be due by August 31, 2026. Secured property tax bills are mailed in the fall. Please contact the Tax Collector for payment and deadlines.

As the elected Assessor of Stanislaus County, it is my sworn responsibility to uphold the State's Property Tax Laws. Our website is an ongoing part of my commitment to keeping you informed of your rights and responsibilities as property owners in Stanislaus County. To contact our office directly please call (209) 525-6461, 8:00 AM to 4:30 PM, Monday through Friday.

Thank you,

Don H. Gaekle

About Us

Who We Are

The Assessor is primarily responsible for preparing an annual assessment roll upon which property tax revenues are generated. The County, Public Schools, Cities, Redevelopment Agencies, and Special Districts all rely on this revenue for funding operations.

What We Do

All property, excluding supplies, movable equipment, boats, and aircraft, are assessed based upon their market value when purchased or newly constructed. The Assessor determines the market value for the ownership changes and new construction. The supplies, movable equipment, boats, and aircraft are assessed based upon their annual market value on January 1 of each year. The Assessor also maintains property parcel maps. These maps are available to the public in the Assessor's Office or at the County's web site (GIS Maps Viewer). The property tax assessment roll, property ownership information, and some property characteristics are also available to the public at the Assessor's Office.

What We Offer

The mission of the Stanislaus County Assessor's office is to produce a fair, accurate and timely assessment roll while providing excellent customer service.
Fee-based annual data subscriptions are also available. See "Assessor Services" for more information.
The Assessor's Office is open Monday-Friday, 8:00 am to 4:30 pm.
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